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Diffstat (limited to 'ext/node/polyfills/_crypto/crypto_browserify/browserify_aes/aes.js')
-rw-r--r-- | ext/node/polyfills/_crypto/crypto_browserify/browserify_aes/aes.js | 244 |
1 files changed, 244 insertions, 0 deletions
diff --git a/ext/node/polyfills/_crypto/crypto_browserify/browserify_aes/aes.js b/ext/node/polyfills/_crypto/crypto_browserify/browserify_aes/aes.js new file mode 100644 index 000000000..991b238fe --- /dev/null +++ b/ext/node/polyfills/_crypto/crypto_browserify/browserify_aes/aes.js @@ -0,0 +1,244 @@ +// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license. +// Copyright 2014-2017 browserify-aes contributors. All rights reserved. MIT license. +// Copyright 2013 Maxwell Krohn. All rights reserved. MIT license. +// Copyright 2009-2013 Jeff Mott. All rights reserved. MIT license. + +// based on the aes implimentation in triple sec +// https://github.com/keybase/triplesec +// which is in turn based on the one from crypto-js +// https://code.google.com/p/crypto-js/ + +// deno-lint-ignore-file no-var no-inner-declarations + +import { Buffer } from "internal:deno_node/polyfills/buffer.ts"; + +function asUInt32Array(buf) { + if (!Buffer.isBuffer(buf)) buf = Buffer.from(buf); + + var len = (buf.length / 4) | 0; + var out = new Array(len); + + for (var i = 0; i < len; i++) { + out[i] = buf.readUInt32BE(i * 4); + } + + return out; +} + +function scrubVec(v) { + for (var i = 0; i < v.length; v++) { + v[i] = 0; + } +} + +function cryptBlock(M, keySchedule, SUB_MIX, SBOX, nRounds) { + var SUB_MIX0 = SUB_MIX[0]; + var SUB_MIX1 = SUB_MIX[1]; + var SUB_MIX2 = SUB_MIX[2]; + var SUB_MIX3 = SUB_MIX[3]; + + var s0 = M[0] ^ keySchedule[0]; + var s1 = M[1] ^ keySchedule[1]; + var s2 = M[2] ^ keySchedule[2]; + var s3 = M[3] ^ keySchedule[3]; + var t0, t1, t2, t3; + var ksRow = 4; + + for (var round = 1; round < nRounds; round++) { + t0 = SUB_MIX0[s0 >>> 24] ^ SUB_MIX1[(s1 >>> 16) & 0xff] ^ + SUB_MIX2[(s2 >>> 8) & 0xff] ^ SUB_MIX3[s3 & 0xff] ^ keySchedule[ksRow++]; + t1 = SUB_MIX0[s1 >>> 24] ^ SUB_MIX1[(s2 >>> 16) & 0xff] ^ + SUB_MIX2[(s3 >>> 8) & 0xff] ^ SUB_MIX3[s0 & 0xff] ^ keySchedule[ksRow++]; + t2 = SUB_MIX0[s2 >>> 24] ^ SUB_MIX1[(s3 >>> 16) & 0xff] ^ + SUB_MIX2[(s0 >>> 8) & 0xff] ^ SUB_MIX3[s1 & 0xff] ^ keySchedule[ksRow++]; + t3 = SUB_MIX0[s3 >>> 24] ^ SUB_MIX1[(s0 >>> 16) & 0xff] ^ + SUB_MIX2[(s1 >>> 8) & 0xff] ^ SUB_MIX3[s2 & 0xff] ^ keySchedule[ksRow++]; + s0 = t0; + s1 = t1; + s2 = t2; + s3 = t3; + } + + t0 = ((SBOX[s0 >>> 24] << 24) | (SBOX[(s1 >>> 16) & 0xff] << 16) | + (SBOX[(s2 >>> 8) & 0xff] << 8) | SBOX[s3 & 0xff]) ^ keySchedule[ksRow++]; + t1 = ((SBOX[s1 >>> 24] << 24) | (SBOX[(s2 >>> 16) & 0xff] << 16) | + (SBOX[(s3 >>> 8) & 0xff] << 8) | SBOX[s0 & 0xff]) ^ keySchedule[ksRow++]; + t2 = ((SBOX[s2 >>> 24] << 24) | (SBOX[(s3 >>> 16) & 0xff] << 16) | + (SBOX[(s0 >>> 8) & 0xff] << 8) | SBOX[s1 & 0xff]) ^ keySchedule[ksRow++]; + t3 = ((SBOX[s3 >>> 24] << 24) | (SBOX[(s0 >>> 16) & 0xff] << 16) | + (SBOX[(s1 >>> 8) & 0xff] << 8) | SBOX[s2 & 0xff]) ^ keySchedule[ksRow++]; + t0 = t0 >>> 0; + t1 = t1 >>> 0; + t2 = t2 >>> 0; + t3 = t3 >>> 0; + + return [t0, t1, t2, t3]; +} + +// AES constants +var RCON = [0x00, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36]; +var G = (function () { + // Compute double table + var d = new Array(256); + for (var j = 0; j < 256; j++) { + if (j < 128) { + d[j] = j << 1; + } else { + d[j] = (j << 1) ^ 0x11b; + } + } + + var SBOX = []; + var INV_SBOX = []; + var SUB_MIX = [[], [], [], []]; + var INV_SUB_MIX = [[], [], [], []]; + + // Walk GF(2^8) + var x = 0; + var xi = 0; + for (var i = 0; i < 256; ++i) { + // Compute sbox + var sx = xi ^ (xi << 1) ^ (xi << 2) ^ (xi << 3) ^ (xi << 4); + sx = (sx >>> 8) ^ (sx & 0xff) ^ 0x63; + SBOX[x] = sx; + INV_SBOX[sx] = x; + + // Compute multiplication + var x2 = d[x]; + var x4 = d[x2]; + var x8 = d[x4]; + + // Compute sub bytes, mix columns tables + var t = (d[sx] * 0x101) ^ (sx * 0x1010100); + SUB_MIX[0][x] = (t << 24) | (t >>> 8); + SUB_MIX[1][x] = (t << 16) | (t >>> 16); + SUB_MIX[2][x] = (t << 8) | (t >>> 24); + SUB_MIX[3][x] = t; + + // Compute inv sub bytes, inv mix columns tables + t = (x8 * 0x1010101) ^ (x4 * 0x10001) ^ (x2 * 0x101) ^ (x * 0x1010100); + INV_SUB_MIX[0][sx] = (t << 24) | (t >>> 8); + INV_SUB_MIX[1][sx] = (t << 16) | (t >>> 16); + INV_SUB_MIX[2][sx] = (t << 8) | (t >>> 24); + INV_SUB_MIX[3][sx] = t; + + if (x === 0) { + x = xi = 1; + } else { + x = x2 ^ d[d[d[x8 ^ x2]]]; + xi ^= d[d[xi]]; + } + } + + return { + SBOX: SBOX, + INV_SBOX: INV_SBOX, + SUB_MIX: SUB_MIX, + INV_SUB_MIX: INV_SUB_MIX, + }; +})(); + +export function AES(key) { + this._key = asUInt32Array(key); + this._reset(); +} + +AES.blockSize = 4 * 4; +AES.keySize = 256 / 8; +AES.prototype.blockSize = AES.blockSize; +AES.prototype.keySize = AES.keySize; +AES.prototype._reset = function () { + var keyWords = this._key; + var keySize = keyWords.length; + var nRounds = keySize + 6; + var ksRows = (nRounds + 1) * 4; + + var keySchedule = []; + for (var k = 0; k < keySize; k++) { + keySchedule[k] = keyWords[k]; + } + + for (k = keySize; k < ksRows; k++) { + var t = keySchedule[k - 1]; + + if (k % keySize === 0) { + t = (t << 8) | (t >>> 24); + t = (G.SBOX[t >>> 24] << 24) | + (G.SBOX[(t >>> 16) & 0xff] << 16) | + (G.SBOX[(t >>> 8) & 0xff] << 8) | + (G.SBOX[t & 0xff]); + + t ^= RCON[(k / keySize) | 0] << 24; + } else if (keySize > 6 && k % keySize === 4) { + t = (G.SBOX[t >>> 24] << 24) | + (G.SBOX[(t >>> 16) & 0xff] << 16) | + (G.SBOX[(t >>> 8) & 0xff] << 8) | + (G.SBOX[t & 0xff]); + } + + keySchedule[k] = keySchedule[k - keySize] ^ t; + } + + var invKeySchedule = []; + for (var ik = 0; ik < ksRows; ik++) { + var ksR = ksRows - ik; + var tt = keySchedule[ksR - (ik % 4 ? 0 : 4)]; + + if (ik < 4 || ksR <= 4) { + invKeySchedule[ik] = tt; + } else { + invKeySchedule[ik] = G.INV_SUB_MIX[0][G.SBOX[tt >>> 24]] ^ + G.INV_SUB_MIX[1][G.SBOX[(tt >>> 16) & 0xff]] ^ + G.INV_SUB_MIX[2][G.SBOX[(tt >>> 8) & 0xff]] ^ + G.INV_SUB_MIX[3][G.SBOX[tt & 0xff]]; + } + } + + this._nRounds = nRounds; + this._keySchedule = keySchedule; + this._invKeySchedule = invKeySchedule; +}; + +AES.prototype.encryptBlockRaw = function (M) { + M = asUInt32Array(M); + return cryptBlock(M, this._keySchedule, G.SUB_MIX, G.SBOX, this._nRounds); +}; + +AES.prototype.encryptBlock = function (M) { + var out = this.encryptBlockRaw(M); + var buf = Buffer.allocUnsafe(16); + buf.writeUInt32BE(out[0], 0); + buf.writeUInt32BE(out[1], 4); + buf.writeUInt32BE(out[2], 8); + buf.writeUInt32BE(out[3], 12); + return buf; +}; + +AES.prototype.decryptBlock = function (M) { + M = asUInt32Array(M); + + // swap + var m1 = M[1]; + M[1] = M[3]; + M[3] = m1; + + var out = cryptBlock( + M, + this._invKeySchedule, + G.INV_SUB_MIX, + G.INV_SBOX, + this._nRounds, + ); + var buf = Buffer.allocUnsafe(16); + buf.writeUInt32BE(out[0], 0); + buf.writeUInt32BE(out[3], 4); + buf.writeUInt32BE(out[2], 8); + buf.writeUInt32BE(out[1], 12); + return buf; +}; + +AES.prototype.scrub = function () { + scrubVec(this._keySchedule); + scrubVec(this._invKeySchedule); + scrubVec(this._key); +}; |